* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html,
body {
  background-color: #0099ff;
  position: relative;
}

a {
  cursor: pointer;
  text-decoration: none;
}

/* a 标签点击显示白屏 */
.canvas {
  width: 100%;
  height: 100%;
  background-color: #fff;
  position: absolute;
  z-index: 100;
  top: 0;
  left: -100%;
  transition: 0.5s;
}

a:hover .canvas {
  left: 0;
}
